In Three Kingdoms era, there was a big change in the construction technology of earthenware kilns from the aspects that a kiln at that time had the fixed ceiling and walls and its space was divided into several functions. Since such a structure was effective in producing earthenware, the basic structure of earthenware kilns used to be maintained continuously even after that period while having changed and been developed in the direction that some details had been added. Most Studies on the earthenware kilns of Three Kingdoms era have focused mainly on the studies on the structures of them based on the data from many excavation investigations. And together with such studies, the outcomes from the studies with which directly restore and experiment such kilns have been accumulated. Therefore, based on such study materials, the construction processes of kilns were examined and the characteristics and development factors of the construction technology of the earthenware kilns of Three Kingdoms era were looked into. The construction process is progressed in the order of 'Selection of a Proper Site for Construction → Digging depending on the construction methods such as a semi-basement type or a basement one → Construction of Detailed Facilities of Kilns such as walls, ceilings, added fixtures(stages, grooves and waterways), fire holes and fire flues, etc. → Dry of the Inside and Outside of a Kiln → Construction of the exterior facilities such as Exterior Wateraway and Protection Structure, etc.' Some essential factors for the construction technology of earthenware kilns are the selection of a site for digging a semi-basement type kiln or a basement type one, the structure with which the thermal efficiency of a kiln can increase, securing the safety of the input and output of the produced articles and preparing for some auxiliary facilities, etc. Based on such essential factors, the earthenware kilns are to be developed in the direction that some additional facilities should be established in order to increase the thermal efficiency inside a kiln. The representative additional facility is several steps which are established on the wall and the floor of a kiln. Such one or two steps are sometimes established on the floor of the firing part or in a staircase style, but some kilns have some steps on the both sides of walls in order to make the flow of heat smooth. It is comprehended that the development factors of the earthenware kilns having such construction technology are the results being created while the necessity of the technology development becomes bigger and bigger for the purpose of increasing the production volume and producing many pieces of high quality earthenware.